5 Common Circular Knitting Machine Problems That Cause Downtime & How to Fix Them

Published: April 10, 2026 | Category: Textile Machinery Maintenance

Introduction

Circular knitting machines are the core production equipment in the textile manufacturing industry. A single high-speed circular knitting machine can produce a large amount of fabric every day, which means unexpected downtime directly leads to huge production losses and increased costs.

Although these machines are designed for long-term use, many knitting factories often make some avoidable maintenance mistakes, which seriously shorten the service life of circular knitting machines and increase the failure rate. This article summarizes 5 common circular knitting machine problems and provides practical preventive maintenance methods to help you reduce breakdowns and extend machine lifespan.

1. Improper Lubrication & Using Unsuitable Lubricating Oil

This is one of the most common reasons for premature wear of circular knitting machine parts. Many operators ignore the lubrication schedule or use general lubricants that do not meet textile machinery standards.

Why it matters:

Circular knitting machines contain a large number of high-speed moving parts, such as bearings, gears, cam boxes and needle cylinders. Insufficient lubrication will cause severe friction and heat, accelerating part wear. Using the wrong oil may damage sealing parts, attract excessive lint, and reduce the stability of the whole machine.

How to fix it:

• Follow the manufacturer’s lubrication schedule and perform daily lubrication for key components
• Use special anti-wear, anti-foam and lint-resistant lubricating oil for textile machinery
• Keep lubrication tools clean to prevent oil contamination
• Train operators to check oil volume and oil condition during each shift

2. Delaying Replacement of Worn Consumable Parts

Many factories continue to use worn parts to save short-term costs, which often results in more serious secondary damage to the machine.

Why it matters:

Worn knitting needles, sinkers, cam tracks and needle cylinders will not only affect fabric quality but also impact the operating balance of the entire machine. A single damaged needle may scratch the needle cylinder, resulting in high maintenance costs and long downtime.

How to fix it:

• Establish a preventive replacement plan based on running hours instead of waiting for complete failure
• Stock commonly used consumable parts to avoid production interruption
• Regularly check parts for burrs, cracks and deformation
• Replace complete sets of needles at the same time to ensure consistent performance

3. Incorrect Belt Tension & Poor Transmission Belt Condition

Transmission belts, especially PU timing belts and V-belts, are key components for power transmission. Incorrect tension is a typical hidden danger that is easy to ignore.

Why it matters:

• Over-loose belt: Causes slipping, insufficient power, uneven fabric and rapid belt wear
• Over-tight belt: Creates extra pressure on motor bearings, main shafts and pulleys, leading to premature failure

How to fix it:

• Check belt tension weekly with a professional tension gauge
• Adjust according to the standard parameters provided by the manufacturer
• Replace belts with cracks, hardening or surface abrasion in time
• Check pulley alignment to avoid uneven belt wear

4. Neglecting Electrical System Inspection & Cleaning

Electrical faults are one of the main causes of sudden shutdowns of circular knitting machines, yet many factories only repair them after problems occur.

Why it matters:

Textile workshops are full of lint and humidity. Loose wires, dusty sensors and corroded contacts can lead to sudden shutdowns, abnormal signals and even safety risks.

How to fix it:

• Carry out a comprehensive electrical inspection every 3 months
• Regularly clean sensors, contactors and control panels to remove lint and dust
• Fasten all wiring connectors to avoid poor contact
• Replace aging wires and damaged parts in advance

5. Lack of Standardized Operation & Professional Training

Many production losses and machine failures are caused by improper operation. Untrained operators are more likely to cause avoidable mechanical damage.

Why it matters:

Incorrect parameter settings, improper yarn placement and failure to find abnormal vibration or noise in time will accelerate machine wear and reduce production efficiency.

How to fix it:

• Provide systematic training for new operators before independent operation
• Formulate standard operating procedures (SOP) for daily use and maintenance
• Encourage operators to report abnormal noise, vibration and defects immediately
• Arrange regular skill refresh training for the maintenance team

Conclusion

Extending the service life of circular knitting machines does not depend on expensive upgrades, but on standardized preventive maintenance. By solving the above 5 common problems, you can effectively reduce downtime, lower production costs and improve the stability and service life of the equipment.

For textile manufacturers, especially those operating in high-humidity and high-load environments, proper maintenance and high-quality spare parts are crucial to maintaining continuous production. Choosing a reliable supplier of circular knitting machine parts can further help you reduce failure rates and improve overall productivity.

If you need more professional advice on circular knitting machine maintenance or high-quality spare parts support, welcome to contact us for professional technical solutions.